x402basequality 0.30

x402-gated portfolio transactions endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/7/transactions

What it does

This endpoint at lowpaymentfee.com exposes a POST-based API for portfolio transactions at `/api/v1/portfolios/7/transactions`. It is part of a broader platform (lowpaymentfee.com) that offers dozens of x402-gated endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint probed here returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per call. Payment is made via the x402 exact scheme with no API keys or rate limits required. The challenge specifies a maximum timeout of 300 seconds and pays to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.

Documentation is extremely sparse. The landing page lists available endpoints and pricing, but the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what a successful call returns. The endpoint title "Premium API Access" and the path suggest it relates to portfolio transaction data, but the exact request format and response structure are unknown.

Capabilities

x402-paymentusdc-settlementbase-networkportfolio-transactionsper-call-pricingno-api-key

Use cases

  • —Fetching or submitting portfolio transaction data on a per-call payment basis
  • —Integrating pay-per-use financial data into agent workflows without API key management
  • —Programmatic access to portfolio transaction records settled via USDC on Base

Fit

Best for

  • —Agents or developers wanting keyless, pay-per-call access to portfolio transaction data
  • —Users who prefer crypto-native micropayments over subscription billing
  • —Automated workflows that need on-demand financial data without rate limits

Not for

  • —Users who need detailed API documentation or response schema guarantees before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/7/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/7/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of this specific endpoint (portfolio 7 transactions) is unclear beyond the URL path. The docs pages are all empty wallet-connect prompts.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README all show only a wallet connect prompt
  • —No OpenAPI or schema definition for request or response payloads
  • —The specific function of /api/v1/portfolios/7/transactions is undocumented; 'Premium API Access' is a generic label
  • —Cannot verify what data is returned on successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:50:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/QcQF94
x402-gated portfolio transactions endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart